Strawberry – Powdery mildew

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Crop(s):          Strawberry

Disease(s):     Powdery mildew

Resistance management strategy for:

Group 3 Demethylation inhibitors (DMI);
Group 7 Succinate dehydrogenase inhibitors (SDHI);
Group 7+11

Group 7+12

 SDHI + QoI

SDHI + phenylpyrroles (PP);
Group 11

Group 19

 Quinone outside inhibitors (QoI);

Chitin synthase inhibitor;
Group 21 Quinone inside Inhibitor (QiI), and
Group U6 Phenyl-acetamide.

 

Guidelines:

  1. Apply a program of protectant fungicides from early crop establishment and maintain a regular spray program throughout the crop growing cycle.
  2. Do not use the same fungicide group as the last application on runner production and the first application to in-field fruit production.
  3. Do not use Group 3, 11, 19, 21 or U6 fungicides as eradicants (once symptoms are visible).
  4. Do not apply more than four Group 3 sprays per season.
  5. Do not apply more than two consecutive sprays of Group 3,19 or 21 fungicides, including from one season to the next.
  6. If applying Group 7 fungicides (including 7+11 or 7+12), do not apply more than two consecutive sprays before changing to another group.
  7. Do not apply more than three Group 7 containing sprays per season. If consecutive sprays are used, then use the same number of sprays of an alternative group before using another Group 7, including sprays in consecutive seasons.
  8. Do not apply consecutive sprays of Group 11 or U6 fungicides, including from one season to the next.
  9. If three or fewer powdery mildew fungicide sprays are applied per crop, use only one spray containing a Group 11 Use a maximum of three sprays containing a Group 11 or 21 fungicide, or 33% of total sprays (whichever is lower). Do not apply more than three Group 11 or 21 sprays per season.
  10. Do not apply Group 19 fungicides more than 6 times per season, or more than 50% of the total number of fungicide sprays.
  11. Do not apply more than two Group U6 sprays per crop.
  12. No specific resistance management strategy has been developed for low-risk fungicides, including those in Group M and BM. These products should be included in a management strategy as per label recommendations.

Strawberry spray recommendations by mode of action group:

  Gp 3 Gp 7,

Gp 7+11

Gp 7+12

 Gp 11 Gp 19 Gp 21 Gp U6
Max. no of consecutive sprays 2 2 1 2 2 1
Max. no of solo sprays 4 3 -? 6-? 3 2
Max. no of sprays per crop/season 4 3 3 or 33% of spray program, whichever is lower 6 or 50% of spray program 3 or 33% of spray program, whichever is lower 2

 


Related fungicide Documents

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URL: https://croplife.org.au/resources/programs/resistance-management/strawberry-powdery-mildew-3/
Content last updated: June 26, 2024

CropLife Australia’s Resistance Management Strategies provide a guide for crop protection product rotation through product groups. The strategies are a useful tool that supports farmers’ adoption of resistance management. All crop protection products must be handled and applied strictly as specified on the product label or APVMA permits.

These Resistance Management Strategies do not replace product labels. They are a guide only and do not endorse particular products, groups of products or cultural methods in terms of their performance. It is important to check with the Australian regulator’s (APVMA) product database for contemporary information on products and active constituents. The database can be sourced through www.apvma.gov.au

The information given in this strategy is provided in good faith and without any liability for loss or damage suffered as a result of its application and use. Advice given in this strategy is valid as at 26 June 2024. All previous versions of this strategy are now invalid.

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